[PATCH] i386: reliable stack trace support i386 entry.S
To increase the usefulness of reliable stack unwinding, this adds CFI unwind annotations to many low-level i386 routines. Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Jan Beulich
Linus Torvalds
Родитель
176a2718f4
Коммит
fe7cacc1c2
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@ -48,6 +48,7 @@
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#include <asm/smp.h>
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#include <asm/page.h>
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#include <asm/desc.h>
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#include <asm/dwarf2.h>
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#include "irq_vectors.h"
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#define nr_syscalls ((syscall_table_size)/4)
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@ -85,31 +86,67 @@ VM_MASK = 0x00020000
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#define SAVE_ALL \
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cld; \
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pushl %es; \
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CFI_ADJUST_CFA_OFFSET 4;\
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/*CFI_REL_OFFSET es, 0;*/\
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pushl %ds; \
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CFI_ADJUST_CFA_OFFSET 4;\
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/*CFI_REL_OFFSET ds, 0;*/\
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pushl %eax; \
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CFI_ADJUST_CFA_OFFSET 4;\
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CFI_REL_OFFSET eax, 0;\
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pushl %ebp; \
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CFI_ADJUST_CFA_OFFSET 4;\
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CFI_REL_OFFSET ebp, 0;\
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pushl %edi; \
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CFI_ADJUST_CFA_OFFSET 4;\
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CFI_REL_OFFSET edi, 0;\
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pushl %esi; \
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CFI_ADJUST_CFA_OFFSET 4;\
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CFI_REL_OFFSET esi, 0;\
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pushl %edx; \
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CFI_ADJUST_CFA_OFFSET 4;\
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CFI_REL_OFFSET edx, 0;\
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pushl %ecx; \
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CFI_ADJUST_CFA_OFFSET 4;\
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CFI_REL_OFFSET ecx, 0;\
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pushl %ebx; \
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CFI_ADJUST_CFA_OFFSET 4;\
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CFI_REL_OFFSET ebx, 0;\
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movl $(__USER_DS), %edx; \
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movl %edx, %ds; \
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movl %edx, %es;
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#define RESTORE_INT_REGS \
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popl %ebx; \
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CFI_ADJUST_CFA_OFFSET -4;\
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CFI_RESTORE ebx;\
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popl %ecx; \
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CFI_ADJUST_CFA_OFFSET -4;\
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CFI_RESTORE ecx;\
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popl %edx; \
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CFI_ADJUST_CFA_OFFSET -4;\
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CFI_RESTORE edx;\
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popl %esi; \
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CFI_ADJUST_CFA_OFFSET -4;\
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CFI_RESTORE esi;\
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popl %edi; \
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CFI_ADJUST_CFA_OFFSET -4;\
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CFI_RESTORE edi;\
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popl %ebp; \
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popl %eax
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CFI_ADJUST_CFA_OFFSET -4;\
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CFI_RESTORE ebp;\
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popl %eax; \
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CFI_ADJUST_CFA_OFFSET -4;\
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CFI_RESTORE eax
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#define RESTORE_REGS \
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RESTORE_INT_REGS; \
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1: popl %ds; \
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CFI_ADJUST_CFA_OFFSET -4;\
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/*CFI_RESTORE ds;*/\
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2: popl %es; \
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CFI_ADJUST_CFA_OFFSET -4;\
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/*CFI_RESTORE es;*/\
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.section .fixup,"ax"; \
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3: movl $0,(%esp); \
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jmp 1b; \
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@ -122,13 +159,43 @@ VM_MASK = 0x00020000
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.long 2b,4b; \
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.previous
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#define RING0_INT_FRAME \
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CFI_STARTPROC simple;\
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CFI_DEF_CFA esp, 3*4;\
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/*CFI_OFFSET cs, -2*4;*/\
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CFI_OFFSET eip, -3*4
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#define RING0_EC_FRAME \
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CFI_STARTPROC simple;\
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CFI_DEF_CFA esp, 4*4;\
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/*CFI_OFFSET cs, -2*4;*/\
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CFI_OFFSET eip, -3*4
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#define RING0_PTREGS_FRAME \
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CFI_STARTPROC simple;\
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CFI_DEF_CFA esp, OLDESP-EBX;\
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/*CFI_OFFSET cs, CS-OLDESP;*/\
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CFI_OFFSET eip, EIP-OLDESP;\
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/*CFI_OFFSET es, ES-OLDESP;*/\
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/*CFI_OFFSET ds, DS-OLDESP;*/\
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CFI_OFFSET eax, EAX-OLDESP;\
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CFI_OFFSET ebp, EBP-OLDESP;\
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CFI_OFFSET edi, EDI-OLDESP;\
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CFI_OFFSET esi, ESI-OLDESP;\
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CFI_OFFSET edx, EDX-OLDESP;\
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CFI_OFFSET ecx, ECX-OLDESP;\
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CFI_OFFSET ebx, EBX-OLDESP
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ENTRY(ret_from_fork)
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CFI_STARTPROC
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pushl %eax
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CFI_ADJUST_CFA_OFFSET -4
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call schedule_tail
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GET_THREAD_INFO(%ebp)
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popl %eax
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CFI_ADJUST_CFA_OFFSET -4
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jmp syscall_exit
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CFI_ENDPROC
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/*
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* Return to user mode is not as complex as all this looks,
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@ -139,6 +206,7 @@ ENTRY(ret_from_fork)
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# userspace resumption stub bypassing syscall exit tracing
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ALIGN
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RING0_PTREGS_FRAME
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ret_from_exception:
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preempt_stop
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ret_from_intr:
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@ -171,20 +239,33 @@ need_resched:
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call preempt_schedule_irq
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jmp need_resched
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#endif
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CFI_ENDPROC
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/* SYSENTER_RETURN points to after the "sysenter" instruction in
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the vsyscall page. See vsyscall-sysentry.S, which defines the symbol. */
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# sysenter call handler stub
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ENTRY(sysenter_entry)
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CFI_STARTPROC simple
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CFI_DEF_CFA esp, 0
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CFI_REGISTER esp, ebp
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movl TSS_sysenter_esp0(%esp),%esp
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sysenter_past_esp:
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sti
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pushl $(__USER_DS)
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CFI_ADJUST_CFA_OFFSET 4
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/*CFI_REL_OFFSET ss, 0*/
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pushl %ebp
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CFI_ADJUST_CFA_OFFSET 4
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CFI_REL_OFFSET esp, 0
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pushfl
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CFI_ADJUST_CFA_OFFSET 4
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pushl $(__USER_CS)
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CFI_ADJUST_CFA_OFFSET 4
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/*CFI_REL_OFFSET cs, 0*/
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pushl $SYSENTER_RETURN
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CFI_ADJUST_CFA_OFFSET 4
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CFI_REL_OFFSET eip, 0
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/*
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* Load the potential sixth argument from user stack.
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@ -199,6 +280,7 @@ sysenter_past_esp:
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.previous
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pushl %eax
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CFI_ADJUST_CFA_OFFSET 4
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SAVE_ALL
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GET_THREAD_INFO(%ebp)
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@ -219,11 +301,14 @@ sysenter_past_esp:
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xorl %ebp,%ebp
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sti
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sysexit
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CFI_ENDPROC
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# system call handler stub
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ENTRY(system_call)
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RING0_INT_FRAME # can't unwind into user space anyway
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pushl %eax # save orig_eax
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CFI_ADJUST_CFA_OFFSET 4
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SAVE_ALL
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GET_THREAD_INFO(%ebp)
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testl $TF_MASK,EFLAGS(%esp)
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@ -256,10 +341,12 @@ restore_all:
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movb CS(%esp), %al
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andl $(VM_MASK | (4 << 8) | 3), %eax
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cmpl $((4 << 8) | 3), %eax
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CFI_REMEMBER_STATE
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je ldt_ss # returning to user-space with LDT SS
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restore_nocheck:
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RESTORE_REGS
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addl $4, %esp
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CFI_ADJUST_CFA_OFFSET -4
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1: iret
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.section .fixup,"ax"
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iret_exc:
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@ -273,6 +360,7 @@ iret_exc:
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.long 1b,iret_exc
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.previous
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CFI_RESTORE_STATE
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ldt_ss:
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larl OLDSS(%esp), %eax
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jnz restore_nocheck
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@ -285,11 +373,13 @@ ldt_ss:
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* CPUs, which we can try to work around to make
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* dosemu and wine happy. */
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subl $8, %esp # reserve space for switch16 pointer
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CFI_ADJUST_CFA_OFFSET 8
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cli
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movl %esp, %eax
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/* Set up the 16bit stack frame with switch32 pointer on top,
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* and a switch16 pointer on top of the current frame. */
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call setup_x86_bogus_stack
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CFI_ADJUST_CFA_OFFSET -8 # frame has moved
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RESTORE_REGS
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lss 20+4(%esp), %esp # switch to 16bit stack
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1: iret
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@ -297,9 +387,11 @@ ldt_ss:
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.align 4
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.long 1b,iret_exc
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.previous
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CFI_ENDPROC
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# perform work that needs to be done immediately before resumption
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ALIGN
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RING0_PTREGS_FRAME # can't unwind into user space anyway
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work_pending:
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testb $_TIF_NEED_RESCHED, %cl
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jz work_notifysig
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@ -329,8 +421,10 @@ work_notifysig: # deal with pending signals and
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work_notifysig_v86:
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#ifdef CONFIG_VM86
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pushl %ecx # save ti_flags for do_notify_resume
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CFI_ADJUST_CFA_OFFSET 4
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call save_v86_state # %eax contains pt_regs pointer
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popl %ecx
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CFI_ADJUST_CFA_OFFSET -4
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movl %eax, %esp
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xorl %edx, %edx
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call do_notify_resume
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@ -363,19 +457,21 @@ syscall_exit_work:
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movl $1, %edx
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call do_syscall_trace
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jmp resume_userspace
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CFI_ENDPROC
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ALIGN
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RING0_INT_FRAME # can't unwind into user space anyway
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syscall_fault:
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pushl %eax # save orig_eax
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CFI_ADJUST_CFA_OFFSET 4
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SAVE_ALL
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GET_THREAD_INFO(%ebp)
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movl $-EFAULT,EAX(%esp)
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jmp resume_userspace
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ALIGN
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syscall_badsys:
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movl $-ENOSYS,EAX(%esp)
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jmp resume_userspace
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CFI_ENDPROC
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#define FIXUP_ESPFIX_STACK \
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movl %esp, %eax; \
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@ -387,16 +483,21 @@ syscall_badsys:
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movl %eax, %esp;
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#define UNWIND_ESPFIX_STACK \
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pushl %eax; \
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CFI_ADJUST_CFA_OFFSET 4; \
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movl %ss, %eax; \
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/* see if on 16bit stack */ \
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cmpw $__ESPFIX_SS, %ax; \
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jne 28f; \
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movl $__KERNEL_DS, %edx; \
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movl %edx, %ds; \
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movl %edx, %es; \
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je 28f; \
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27: popl %eax; \
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CFI_ADJUST_CFA_OFFSET -4; \
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.section .fixup,"ax"; \
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28: movl $__KERNEL_DS, %eax; \
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movl %eax, %ds; \
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movl %eax, %es; \
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/* switch to 32bit stack */ \
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FIXUP_ESPFIX_STACK \
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28: popl %eax;
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FIXUP_ESPFIX_STACK; \
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jmp 27b; \
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.previous
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/*
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* Build the entry stubs and pointer table with
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@ -408,9 +509,14 @@ ENTRY(interrupt)
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vector=0
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ENTRY(irq_entries_start)
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RING0_INT_FRAME
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.rept NR_IRQS
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ALIGN
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.if vector
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CFI_ADJUST_CFA_OFFSET -4
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.endif
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1: pushl $vector-256
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CFI_ADJUST_CFA_OFFSET 4
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jmp common_interrupt
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.data
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.long 1b
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@ -424,60 +530,99 @@ common_interrupt:
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movl %esp,%eax
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call do_IRQ
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jmp ret_from_intr
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CFI_ENDPROC
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#define BUILD_INTERRUPT(name, nr) \
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ENTRY(name) \
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RING0_INT_FRAME; \
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pushl $nr-256; \
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SAVE_ALL \
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CFI_ADJUST_CFA_OFFSET 4; \
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SAVE_ALL; \
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movl %esp,%eax; \
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call smp_/**/name; \
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jmp ret_from_intr;
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jmp ret_from_intr; \
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CFI_ENDPROC
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/* The include is where all of the SMP etc. interrupts come from */
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#include "entry_arch.h"
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ENTRY(divide_error)
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RING0_INT_FRAME
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pushl $0 # no error code
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CFI_ADJUST_CFA_OFFSET 4
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pushl $do_divide_error
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CFI_ADJUST_CFA_OFFSET 4
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ALIGN
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error_code:
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pushl %ds
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CFI_ADJUST_CFA_OFFSET 4
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/*CFI_REL_OFFSET ds, 0*/
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pushl %eax
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CFI_ADJUST_CFA_OFFSET 4
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CFI_REL_OFFSET eax, 0
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xorl %eax, %eax
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pushl %ebp
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CFI_ADJUST_CFA_OFFSET 4
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CFI_REL_OFFSET ebp, 0
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pushl %edi
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CFI_ADJUST_CFA_OFFSET 4
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CFI_REL_OFFSET edi, 0
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pushl %esi
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CFI_ADJUST_CFA_OFFSET 4
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CFI_REL_OFFSET esi, 0
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pushl %edx
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CFI_ADJUST_CFA_OFFSET 4
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CFI_REL_OFFSET edx, 0
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decl %eax # eax = -1
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pushl %ecx
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CFI_ADJUST_CFA_OFFSET 4
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CFI_REL_OFFSET ecx, 0
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pushl %ebx
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CFI_ADJUST_CFA_OFFSET 4
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CFI_REL_OFFSET ebx, 0
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cld
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pushl %es
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CFI_ADJUST_CFA_OFFSET 4
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/*CFI_REL_OFFSET es, 0*/
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UNWIND_ESPFIX_STACK
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popl %ecx
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CFI_ADJUST_CFA_OFFSET -4
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/*CFI_REGISTER es, ecx*/
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movl ES(%esp), %edi # get the function address
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movl ORIG_EAX(%esp), %edx # get the error code
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movl %eax, ORIG_EAX(%esp)
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movl %ecx, ES(%esp)
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/*CFI_REL_OFFSET es, ES*/
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movl $(__USER_DS), %ecx
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movl %ecx, %ds
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movl %ecx, %es
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movl %esp,%eax # pt_regs pointer
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call *%edi
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jmp ret_from_exception
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CFI_ENDPROC
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ENTRY(coprocessor_error)
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RING0_INT_FRAME
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pushl $0
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CFI_ADJUST_CFA_OFFSET 4
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pushl $do_coprocessor_error
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CFI_ADJUST_CFA_OFFSET 4
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jmp error_code
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CFI_ENDPROC
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ENTRY(simd_coprocessor_error)
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RING0_INT_FRAME
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pushl $0
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CFI_ADJUST_CFA_OFFSET 4
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pushl $do_simd_coprocessor_error
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CFI_ADJUST_CFA_OFFSET 4
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jmp error_code
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CFI_ENDPROC
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ENTRY(device_not_available)
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RING0_INT_FRAME
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pushl $-1 # mark this as an int
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CFI_ADJUST_CFA_OFFSET 4
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SAVE_ALL
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movl %cr0, %eax
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testl $0x4, %eax # EM (math emulation bit)
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@ -487,9 +632,12 @@ ENTRY(device_not_available)
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jmp ret_from_exception
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device_not_available_emulate:
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pushl $0 # temporary storage for ORIG_EIP
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CFI_ADJUST_CFA_OFFSET 4
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call math_emulate
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addl $4, %esp
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CFI_ADJUST_CFA_OFFSET -4
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jmp ret_from_exception
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CFI_ENDPROC
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/*
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* Debug traps and NMI can happen at the one SYSENTER instruction
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@ -514,16 +662,19 @@ label: \
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pushl $sysenter_past_esp
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KPROBE_ENTRY(debug)
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RING0_INT_FRAME
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cmpl $sysenter_entry,(%esp)
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jne debug_stack_correct
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FIX_STACK(12, debug_stack_correct, debug_esp_fix_insn)
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debug_stack_correct:
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pushl $-1 # mark this as an int
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CFI_ADJUST_CFA_OFFSET 4
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SAVE_ALL
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xorl %edx,%edx # error code 0
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movl %esp,%eax # pt_regs pointer
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||||
call do_debug
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jmp ret_from_exception
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CFI_ENDPROC
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.previous .text
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/*
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* NMI is doubly nasty. It can happen _while_ we're handling
|
||||
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@ -534,14 +685,18 @@ debug_stack_correct:
|
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* fault happened on the sysenter path.
|
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*/
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ENTRY(nmi)
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RING0_INT_FRAME
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pushl %eax
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CFI_ADJUST_CFA_OFFSET 4
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movl %ss, %eax
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cmpw $__ESPFIX_SS, %ax
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popl %eax
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CFI_ADJUST_CFA_OFFSET -4
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je nmi_16bit_stack
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cmpl $sysenter_entry,(%esp)
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je nmi_stack_fixup
|
||||
pushl %eax
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
movl %esp,%eax
|
||||
/* Do not access memory above the end of our stack page,
|
||||
* it might not exist.
|
||||
|
|
@ -549,16 +704,19 @@ ENTRY(nmi)
|
|||
andl $(THREAD_SIZE-1),%eax
|
||||
cmpl $(THREAD_SIZE-20),%eax
|
||||
popl %eax
|
||||
CFI_ADJUST_CFA_OFFSET -4
|
||||
jae nmi_stack_correct
|
||||
cmpl $sysenter_entry,12(%esp)
|
||||
je nmi_debug_stack_check
|
||||
nmi_stack_correct:
|
||||
pushl %eax
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
SAVE_ALL
|
||||
xorl %edx,%edx # zero error code
|
||||
movl %esp,%eax # pt_regs pointer
|
||||
call do_nmi
|
||||
jmp restore_all
|
||||
CFI_ENDPROC
|
||||
|
||||
nmi_stack_fixup:
|
||||
FIX_STACK(12,nmi_stack_correct, 1)
|
||||
|
|
@ -574,97 +732,150 @@ nmi_debug_stack_check:
|
|||
jmp nmi_stack_correct
|
||||
|
||||
nmi_16bit_stack:
|
||||
RING0_INT_FRAME
|
||||
/* create the pointer to lss back */
|
||||
pushl %ss
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
pushl %esp
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
movzwl %sp, %esp
|
||||
addw $4, (%esp)
|
||||
/* copy the iret frame of 12 bytes */
|
||||
.rept 3
|
||||
pushl 16(%esp)
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
.endr
|
||||
pushl %eax
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
SAVE_ALL
|
||||
FIXUP_ESPFIX_STACK # %eax == %esp
|
||||
CFI_ADJUST_CFA_OFFSET -20 # the frame has now moved
|
||||
xorl %edx,%edx # zero error code
|
||||
call do_nmi
|
||||
RESTORE_REGS
|
||||
lss 12+4(%esp), %esp # back to 16bit stack
|
||||
1: iret
|
||||
CFI_ENDPROC
|
||||
.section __ex_table,"a"
|
||||
.align 4
|
||||
.long 1b,iret_exc
|
||||
.previous
|
||||
|
||||
KPROBE_ENTRY(int3)
|
||||
RING0_INT_FRAME
|
||||
pushl $-1 # mark this as an int
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
SAVE_ALL
|
||||
xorl %edx,%edx # zero error code
|
||||
movl %esp,%eax # pt_regs pointer
|
||||
call do_int3
|
||||
jmp ret_from_exception
|
||||
CFI_ENDPROC
|
||||
.previous .text
|
||||
|
||||
ENTRY(overflow)
|
||||
RING0_INT_FRAME
|
||||
pushl $0
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
pushl $do_overflow
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
jmp error_code
|
||||
CFI_ENDPROC
|
||||
|
||||
ENTRY(bounds)
|
||||
RING0_INT_FRAME
|
||||
pushl $0
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
pushl $do_bounds
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
jmp error_code
|
||||
CFI_ENDPROC
|
||||
|
||||
ENTRY(invalid_op)
|
||||
RING0_INT_FRAME
|
||||
pushl $0
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
pushl $do_invalid_op
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
jmp error_code
|
||||
CFI_ENDPROC
|
||||
|
||||
ENTRY(coprocessor_segment_overrun)
|
||||
RING0_INT_FRAME
|
||||
pushl $0
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
pushl $do_coprocessor_segment_overrun
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
jmp error_code
|
||||
CFI_ENDPROC
|
||||
|
||||
ENTRY(invalid_TSS)
|
||||
RING0_EC_FRAME
|
||||
pushl $do_invalid_TSS
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
jmp error_code
|
||||
CFI_ENDPROC
|
||||
|
||||
ENTRY(segment_not_present)
|
||||
RING0_EC_FRAME
|
||||
pushl $do_segment_not_present
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
jmp error_code
|
||||
CFI_ENDPROC
|
||||
|
||||
ENTRY(stack_segment)
|
||||
RING0_EC_FRAME
|
||||
pushl $do_stack_segment
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
jmp error_code
|
||||
CFI_ENDPROC
|
||||
|
||||
KPROBE_ENTRY(general_protection)
|
||||
RING0_EC_FRAME
|
||||
pushl $do_general_protection
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
jmp error_code
|
||||
CFI_ENDPROC
|
||||
.previous .text
|
||||
|
||||
ENTRY(alignment_check)
|
||||
RING0_EC_FRAME
|
||||
pushl $do_alignment_check
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
jmp error_code
|
||||
CFI_ENDPROC
|
||||
|
||||
KPROBE_ENTRY(page_fault)
|
||||
RING0_EC_FRAME
|
||||
pushl $do_page_fault
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
jmp error_code
|
||||
CFI_ENDPROC
|
||||
.previous .text
|
||||
|
||||
#ifdef CONFIG_X86_MCE
|
||||
ENTRY(machine_check)
|
||||
RING0_INT_FRAME
|
||||
pushl $0
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
pushl machine_check_vector
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
jmp error_code
|
||||
CFI_ENDPROC
|
||||
#endif
|
||||
|
||||
ENTRY(spurious_interrupt_bug)
|
||||
RING0_INT_FRAME
|
||||
pushl $0
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
pushl $do_spurious_interrupt_bug
|
||||
CFI_ADJUST_CFA_OFFSET 4
|
||||
jmp error_code
|
||||
CFI_ENDPROC
|
||||
|
||||
#ifdef CONFIG_STACK_UNWIND
|
||||
ENTRY(arch_unwind_init_running)
|
||||
CFI_STARTPROC
|
||||
movl 4(%esp), %edx
|
||||
movl (%esp), %ecx
|
||||
leal 4(%esp), %eax
|
||||
|
|
@ -689,6 +900,7 @@ ENTRY(arch_unwind_init_running)
|
|||
movl EBX(%edx), %ebx
|
||||
movl $__KERNEL_DS, OLDSS(%edx)
|
||||
jmpl *%eax
|
||||
CFI_ENDPROC
|
||||
ENDPROC(arch_unwind_init_running)
|
||||
#endif
|
||||
|
||||
|
|
|
|||
|
|
@ -0,0 +1,54 @@
|
|||
#ifndef _DWARF2_H
|
||||
#define _DWARF2_H
|
||||
|
||||
#include <linux/config.h>
|
||||
|
||||
#ifndef __ASSEMBLY__
|
||||
#warning "asm/dwarf2.h should be only included in pure assembly files"
|
||||
#endif
|
||||
|
||||
/*
|
||||
Macros for dwarf2 CFI unwind table entries.
|
||||
See "as.info" for details on these pseudo ops. Unfortunately
|
||||
they are only supported in very new binutils, so define them
|
||||
away for older version.
|
||||
*/
|
||||
|
||||
#ifdef CONFIG_UNWIND_INFO
|
||||
|
||||
#define CFI_STARTPROC .cfi_startproc
|
||||
#define CFI_ENDPROC .cfi_endproc
|
||||
#define CFI_DEF_CFA .cfi_def_cfa
|
||||
#define CFI_DEF_CFA_REGISTER .cfi_def_cfa_register
|
||||
#define CFI_DEF_CFA_OFFSET .cfi_def_cfa_offset
|
||||
#define CFI_ADJUST_CFA_OFFSET .cfi_adjust_cfa_offset
|
||||
#define CFI_OFFSET .cfi_offset
|
||||
#define CFI_REL_OFFSET .cfi_rel_offset
|
||||
#define CFI_REGISTER .cfi_register
|
||||
#define CFI_RESTORE .cfi_restore
|
||||
#define CFI_REMEMBER_STATE .cfi_remember_state
|
||||
#define CFI_RESTORE_STATE .cfi_restore_state
|
||||
|
||||
#else
|
||||
|
||||
/* Due to the structure of pre-exisiting code, don't use assembler line
|
||||
comment character # to ignore the arguments. Instead, use a dummy macro. */
|
||||
.macro ignore a=0, b=0, c=0, d=0
|
||||
.endm
|
||||
|
||||
#define CFI_STARTPROC ignore
|
||||
#define CFI_ENDPROC ignore
|
||||
#define CFI_DEF_CFA ignore
|
||||
#define CFI_DEF_CFA_REGISTER ignore
|
||||
#define CFI_DEF_CFA_OFFSET ignore
|
||||
#define CFI_ADJUST_CFA_OFFSET ignore
|
||||
#define CFI_OFFSET ignore
|
||||
#define CFI_REL_OFFSET ignore
|
||||
#define CFI_REGISTER ignore
|
||||
#define CFI_RESTORE ignore
|
||||
#define CFI_REMEMBER_STATE ignore
|
||||
#define CFI_RESTORE_STATE ignore
|
||||
|
||||
#endif
|
||||
|
||||
#endif
|
||||
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